The male psychology here, in my opinion, is that the sense of entitlement is so great they they just can't help putting their hands on women. These guys know that they're, in a sense, kingmakers. But rather than just be happy with the monetary compensation and sense of pride in their power (or see it purely as a good deed since all of us love entertainment and entertainers), they take it one step too far. Jealousy of the attention and publicity that the stars receive might drive the sense of entitlement. Knowing all they can be are kingmakers but never the king (or queen) deep down infuriates them. I don't know.
Or maybe they get into the business just to hurt people for sex. All the rest is secondary. That's an absolutely pathetic waste of a life if you ask me. Maybe that fat pig Weinstein would agree now, too.